This special edition watch is an official remake of the 1963 Chinese Airforce chronograph, a unique and classic masterpiece now coveted by collectors nearly as much as the original. This updated version has a 42mm polished stainless steel case with a mineral crystal exhibition case back (the original was a smaller 38mm size). The white dial features silver numbers and markers and a red star under the 12:00 position. 21 ZUAN on the dial indicates the movement has 21-jewels. The movement is a Seagull No. ST19 mechanical (hand winding) chronograph with 21,600 VPH and shock protection. Power reserve is about 45 hours on a full wind without the chronograph running. The sub-dial on the left is the running seconds counter and the sub-dial on the right is a 30-minute timer. The red seconds hand is activated when you click the pusher at 2:00. The outer portion of the black dial is marked in seconds. The lug with is 22mm and the watch now comes with a red striped NATO-style strap. Features Movement: Seagull Hand Wind Mechanical 21-Jewel Chronograph Case: Polished Stainless Steel, 42mm x 13mm thick Back: Exhibition window back Crystal: Hardened Mineral Band: NATO-style red and black stripe strap, buckle closure. 22mm lug width Water Resistant: 30 meters Warranty: 1 Year